KEY RESULTS benchmark and monitor HOW we get to the objective. Effective KRs are specific and time-bound, aggressive yet realistic. Most of all, they are measurable and verifiable. ( As prize pupil Marissa Mayer would say, “It’s not a key result unless it has a number.”) You either meet a key result’s requirements or you don’t; there is no gray area, no room for doubt. At the end of the designated period, typically a quarter, we declare the key result fulfilled or not.